<!DOCTYPE HTML>
<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>下拉菜单</title>
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <link rel="stylesheet" href="style.css">
</head>

<body>




    <script src="js/jquery.min.js"></script>
    <script src="js/bootstrap.min.js"></script>
</body>

</html>